No exploitation reportedFix available

CVE-2021-22820

Q: Is CVE-2021-22820 actively exploited?

Active exploitation of CVE-2021-22820 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-22820?

CVE-2021-22820 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2022-01-28
Fixed in3.4.0.2
WeaknessCWE-613

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A CWE-614 Insufficient Session Expiration vulnerability exists that could allow an attacker to maintain an unauthorized access over a hijacked session to the charger station web server even after the legitimate user account holder has changed his password. Affected Products: EVlink City EVC1S22P4 / EVC1S7P4 (All versions prior to R8 V3.4.0.2 ), EVlink Parking EVW2 / EVF2 / EVP2PE (All versions prior to R8 V3.4.0.2), and EVlink Smart Wallbox EVB1A (All versions prior to R8 V3.4.0.2)

Timeline

dates in UTC

2022-01-2820:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22820?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22820?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Schneider-electric evlink city evc1s22p4 firmwareversion to verify

Branch	Affected	Fixed in	Source
3.4	< 3.4.0.2	3.4.0.2	NVD

Schneider-electric evlink city evc1s7p4 firmwareversion to verify

Branch	Affected	Fixed in	Source
3.4	< 3.4.0.2	3.4.0.2	NVD

Schneider-electric evlink parking evf2 firmwareversion to verify

Branch	Affected	Fixed in	Source
3.4	< 3.4.0.2	3.4.0.2	NVD

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Schneider-electric evlink city evc1s22p4 firmware to 3.4.0.2

Advisories and patches

download.schneider-electric.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-613read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2022-01-28
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-22820?

Is CVE-2021-22820 actively exploited?

Active exploitation of CVE-2021-22820 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22820?

CVE-2021-22820 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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